:root {
  --bg: #0b1020;
  --card: #12192b;
  --text: #e9eefc;
  --muted: #b0bbd5;
  --primary: #5ea1ff;
  --border: #26324f;
}

:root[data-theme="light"] {
  --bg: #f5f7fc;
  --card: #ffffff;
  --text: #10192d;
  --muted: #4d5b7c;
  --primary: #2f63ff;
  --border: #d9e1f5;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(94,161,255,.22), transparent), var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background .25s ease, color .25s ease;
}

.container { width: min(1080px, 92%); margin: 0 auto; }

.nav-wrap {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
}

.nav { display: flex; justify-content: space-between; align-items: center; padding: 14px 0; gap: 12px; }
.logo { font-weight: 800; color: var(--text); text-decoration: none; }
.links a { color: var(--muted); text-decoration: none; margin-left: 18px; font-weight: 500; }
.links a:hover { color: var(--text); }

.toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
}

.hero { padding: 88px 0 56px; }
.eyebrow { color: var(--primary); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; font-size: .78rem; }
h1 { font-size: clamp(2rem, 4vw, 3.4rem); margin: 8px 0 14px; line-height: 1.15; }
h1 span { color: var(--primary); }
.lead { max-width: 720px; color: var(--muted); margin-bottom: 26px; }

.btn {
  display: inline-block;
  background: linear-gradient(135deg, #5ea1ff, #7d76ff);
  color: #fff;
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 10px;
  font-weight: 600;
}

.section { padding: 34px 0; }
h2 { font-size: 1.6rem; margin: 0 0 14px; }

.grid { display: grid; gap: 14px; }
.projects { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.project h3 { margin-top: 0; margin-bottom: 8px; }

.skill-bars { display: grid; gap: 12px; }
.skill-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
.skill-label { display: flex; justify-content: space-between; color: var(--muted); font-size: .92rem; margin-bottom: 8px; gap: 12px; }
.bar { height: 10px; background: color-mix(in srgb, var(--text) 10%, transparent); border-radius: 999px; overflow: hidden; }
.bar span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(135deg, #5ea1ff, #7d76ff);
  border-radius: 999px;
  transition: width 1s cubic-bezier(.2,.8,.2,1);
}

.timeline { position: relative; margin-left: 8px; }
.timeline::before {
  content: ""; position: absolute; left: 10px; top: 8px; bottom: 8px;
  width: 2px; background: var(--border);
}
.timeline-item { position: relative; margin: 0 0 14px 24px; }
.timeline-item .dot {
  position: absolute; left: -22px; top: 20px;
  width: 10px; height: 10px; border-radius: 50%; background: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 25%, transparent);
}
.role-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.badge {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--muted);
  background: color-mix(in srgb, var(--card) 85%, transparent);
}
.badge-lead { color: #cdd9ff; border-color: #4e67ac; }
.time { color: var(--muted); font-size: .85rem; margin-bottom: 4px; }
.experience-summary { color: var(--muted); margin: 0 0 14px; }
.timeline-item ul { margin: 8px 0 8px 0; padding-left: 18px; }
.timeline-item li { margin: 6px 0; color: var(--muted); }
.timeline-item details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  margin-top: 10px;
  background: color-mix(in srgb, var(--card) 94%, transparent);
}
.timeline-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}
.timeline-item summary::marker { color: var(--primary); }

.contact-links a { color: var(--primary); text-decoration: none; }
.footer { padding: 34px 0 48px; color: var(--muted); border-top: 1px solid color-mix(in srgb, var(--text) 10%, transparent); margin-top: 22px; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

@media (max-width: 760px) {
  .links { display: none; }
  .hero { padding-top: 62px; }
}